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Power Management
User’s Manual 22
Document Number: 320264
Agilent 34401A (6½ digit
display)
Fluke 79 (3 digit display)
Specification (±0.0030 % of reading)
+ (±0.0030 % of range)
±0.09% ±2 digits
Min Voltage displayed
Calculated power
1.49193 mV
0.22258 mW
1.47 mV
0.216 mW
Max voltage displayed
Calculated power
1.49206 mV
0.22624 mW
1.51 mV
0.228 mW
Error in power ±0.009 % ±0.3 %
NOTE: The precision achieved by using a high precision digital multi-meter versus a normal
digital multi-meter is ~33 times more accurate.
Table 7 summarizes all the power measurement sense resistors located on the Crown
Beach board. All sense resistors are 0.01 Ω unless otherwise noted.
Table 7. Crown Beach Voltage Rails
Sch Page
Component
Voltage
Supply
Rail
Ref Des
Resistor
Supply
Power
Topology
11 SCH 1.8 V +V1.8 +V1.8_SM_SCH R5T3
0.01,
1% DDR2_VR
11 SCH 1.05 V +V1.05S_SCH +V1.05S_SCH_VCORE R6T7
0.01,
1%
VCORE
11 SCH 1.5 V +V1.5S_SCH +V1.5S_DLVDS_SCH R6T9
0.01,
1% LVDS
11 SCH 3.3 V +V3.3 +V3.3_SCH_SUS R6T13
0.01,
1% SUS
11 SCH 3.3 V +V3.3S +V3.3S_SCH R5T5
0.01,
1%
3.3 V
11 SCH 1.05 V +V1.05S_VTT +V1.05S_VTT_SCH R5U35
0.01,
1% VTT SCH
11 SCH 1.5 V +V1.5S +V1.5S_SCH R5T6
0.01,
1% 1.5CORE
11 SCH 1.5 V +V1.5S_SCH +V1.5S_SDVO_SCH R6T10
0.01,
1%
SDVO
11 SCH 1.05 V +V1.05S_VTT +V1.05S_VTT_CPU R3U1
0.01,
1% VTT CPU